6. RESULTS EXPECTED FROM THE DATA

A brief history of the connection between observation and theory of
the ``particles'' in the universe was given in
Sect. 2.3. The final
comment here concerns the observational tests for the theory discussed
in Sects. 3 and 4.

``This paper has sought to make clear what particular set of
assumptions are being tested when comparison is made with any
particular set of observational results. The broad conclusions to
which we are led are these:
If we compare a relation like that connecting apparent size, apparent
brightness, and redshift we are testing merely the correctness of our
interpretation of the observed quantities, and not any particular
theory of them.
If we make all possible observations on the ``distances'', red-shifts,
and numbers of extra-galactic nebulae we are testing the possibility
of representing them as fundamental particles in a universe of the
type (1) [with Friedmann-Lemaître-Robertson-Walker metric], and the
correctness of the derivation of `world-pictures' in such a model.
In order however to choose between such models and classical ones it
will in general be necessary to test....terms in k in expressions
involving the numbers of nebulae . . .''.

Thus the connection is made to the most recent suggestion concerning
k / R2 measurements
(Sect. 3.2.1).

One diagram of each type of relation mentioned by McCrea will be shown
in the following.